Apparatus for mixing cement and fibrous material.



1. NEEIIL APPARATUS FOR MIXING CEMENT AND nanou M'IAIEBIAL- Patented Ma4, 1915 2 SHEETS SHEET I.

APPLICATION FILED MAR. 6.1914.

WITNESSES INVENTOR M? y: @Z W 1. NEETE|L APPARATUS FOR MIXING CEMENT ANDFIBROUS MATERIAL. APPLICATION FILED MAR. 6. 1914.

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WITNESSES v 4 J/Veefwa. gg/i/gjzlw 3W Q, Amvi x time rages AT JANNEETRIL F PRAGUE, AUSTRIA-HUNGARY, ASSIGNOR T0. JOSEPH PRINCE(loIaLoREDo MANNsFELD, 0F DOBRIS, AUSTRIA-HUNGARY APPARATUS FOR MIXINGCEMENT AND FIBROUS MATERIAL.

- To all whom it may concern:

3 Be it known that I, J AN Nnsn'rfun, citizen of the Austro-HungarianEmpire, residing at Prague, '11, Austria-Hungary, have in- 5 ventedcertain new and useful Improvements in Apparatus for Mixing Cement andFibrous Material, of which the following is a specification. Thisinvention relates to 'an apparatus for mixing'cement and fibrousmaterial such as asbestos, for use in the molding of railway sleepersand other articles, f '7 The object of the invention is'to insure aproper reduction of the fibrous material and a thorough intermingling ofthe reduced fiber with the pulverized or powered cement, first in thedry state and then with the addition of water, and to enable theseoperations to be carried out by and'in thesame appa ratus witheflioiency and economy.

WVith these objects in view the mvention consists in the combination ofparts herelnafter referred to and set forth in the claims.

Inthe accompanying drawings :Figures 1 and 2 are respectively asectional front elevation and a sectional side elevation of one form ofapparatus according to the inven? tion.

The form of apparatus illustrated comin a casing 24, and-astationarycover or roof- 26 provided with spikes between which and the spikes onthe drum the asbestos is torn or reduced to small pieces or fibers.Adjacent to the drum and forming part of the casing 24 is a storecompartment 27 for the pulverized cement, a conveying roller 28,arranged at the lower end of the said compartment conveying the cementinto the path of co. the fibers falling down from the drum 25.

At a point where the fibers and the cement meet, a pair of rollers 29,are revclubly mounted- These rollers are provided with a series ofgrooves in such a manner that the as points of the grooves of one rollerengage.

the corresponding grooves of the other roller. Moreover, the smallerroller 30 rotates at a greater speed than the larger roller 29 and inthis way and by these means 59 the asbestos fibers and the cement aresubjected to a primary mixing and the fibers are combed or made to lieparallel to each other. Below the rollers 29, 30 is a funnel whichleadsthe mixture into a secondary mixing device comprising a main casing 24Specification of Letters Patent.

Patented May 4, 1915.

Application filed March 6, 1914. Serial No. 822,982.

in which there is a second smaller casing 31 of substantiallycylindrical shape and rotafore to allow of the admission of water intoas the asbestos-cement mixture-during the secondary mixing operation.Alternately mounted between the plates 33 and on the circumference ofthe drum 32 and partly withinrecesses provided therein are rollers 73 36the axles of which carry on one side toothed wheels 37., 'All of thesetoothed wheels mesh witha stationary large toothed wheel 38 so that therollers 36, upon the rotat1on of the drum 32, are caused to rotate notonly around their own axes but also around that of the said drum, thuseffecting a thorough secondary mixture and uniform moistening of theasbestos and cement. The resulting mixture is now caused to drop into afunnel 41 secured at the bottom of the casing 31 whence it falls betweentwo rollers 39 and finally into a charge or filling box 47. The upperfunnel 40 mounted at the top of the casing for the reception andguidance of'the falling asbestos and cement, and the lower funnel 41 areprovided with slides 42 and 43 respectively, in order that thecorresponding inlets to and outlets from the casing may be shut off whenso desired.

Toconvey the mixture of asbestos" and cement provision is made on thebase 44 of the main casing 24 of a small rail track 45. A wagon or truck46 preferably having rubber tires is adapted to carry the filling Waterto said secondary mixing means, and means for discharging the resultingWet mlxture substantially as hereinbefore set forth.

2. Apparatus for mixing cement and fibrous material, comprising meansfor re fibrous material, comprising a spiked roller and a spiked surfacein fixed relation thereto, for reducing the fibrous material, a hopperfor pulverized cement, a pair of intermeshing grooved rollers below'said spiked roller and hopper for subjecting the fibrous material andcement to a primary mixing, secondary mixing means, a funnel forconveying the primarily mixed fibrous material and cement from theaforesaid rollers to the said secondary mixing means, and means forsupplying water to said secondary mixing means substantially as and forthe purpose hereinbefore set forth.

4. Apparatus for mixing cement and fibrous material, comprising, primarymixing means for mixing fibrous material and cement in the dry-state, afunnel for discharging the dry mixture to secondary mixing means saidsecondary mixing means consisting of two concentric casings, the largerbeing stationary and the smaller being rot-table, hollow perforatedplates on said rotay casing, a hollow shaft for said rotary casing,tubes connecting said shaft with the aforesaid hollow plates forconveying Water thereto, and rollers carried by the rotary casing, andmeans for rotating said rollers about their own axes, substantially asand for the purpose hereinbefore set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses. v

JAN NESETRIL. lVitnesses:

J osnr Lnrenormcn, JAN B. VOJiiEK.

